Rotating shaft position locking device

Abstract

The invention relates to a rotating shaft position locking device which comprises a hydraulic control valve power supply circuit, a hydraulic valve master controller, a hydraulic control valve communication circuit, a hydraulic control valve actuator driving circuit, a hydraulic control valve actuator, a position sensor and a fault alarm function module. The hydraulic control valve power supply circuit supplies power, the hydraulic valve master control logic and the hydraulic control valve communication circuit carry out safe communication through an AES encryption protocol, the actuator driving circuit drives the actuator to achieve rotation and locking of a rotating shaft, the position sensor adopts a non-contact magnetic encoder to feed back position and speed information in real time, and when the position is abnormal or communication fails, the master control triggers an alarm. The device solves the problems that an existing hydraulic control valve is inaccurate in position detection and unsafe in communication, accurate control over the position of the rotating shaft can be achieved, and safety and reliability are improved.

Description

Technical Field

[0001] The present application relates to the field of fluid control technology, and in particular to a rotating shaft position locking device. Background Art

[0002] Control valves play a key role in industrial production. They are composed of valve body assemblies and actuator assemblies. As a type of control valve, hydraulic control valves rely on hydraulic pressure to control fluid flow and are widely used in many fields such as spraying equipment, hydraulic systems, and petrochemicals. The hydraulic control valve moves the valve core through control signals, thereby changing the flow and direction of the fluid. The valve seat plays an important role in sealing and conducting.

[0003] However, existing hydraulic control valves have many shortcomings. On the one hand, the actuator's execution component lacks detection sensors, making it difficult to obtain its actual position, resulting in the inability to guarantee the control accuracy of the rotating shaft position lock and the inability to meet high-precision control requirements. On the other hand, the actuator command signals are mostly simple IO signals, which do not have encryption functions and are easy to be cracked, posing great risks in industrial scenarios with high security requirements. In addition, ordinary manual hydraulic control valves do not have electronic control systems, and hydraulic control valves with electronic control systems lack encrypted communication circuits, which cannot adapt to the development trend of modern industrial intelligence and security. Summary of the invention

[0004] The present invention is mainly aimed at the above problems existing in the prior art, and provides a rotating shaft position locking device, which realizes precise control and safe communication of the rotating shaft position of the hydraulic control valve by introducing a position sensor and an encrypted communication circuit.

[0005] The purpose of the present invention is mainly achieved through the following solutions: A rotating shaft position locking device, comprising: The hydraulic control valve power supply circuit is used to provide power for the entire device; Hydraulic valve master control, used to control the operation logic of the device and receive external instructions; The hydraulic control valve communication circuit uses an encrypted communication protocol to achieve secure communication with external devices or systems; The hydraulic control valve actuator driving circuit is used to drive the hydraulic control valve actuator to realize the opening and closing of the hydraulic control valve; The hydraulically controlled valve actuator includes a rotating shaft and a locking mechanism thereof, and the rotation and locking of the rotating shaft are realized by a driving circuit of the hydraulically controlled valve actuator, thereby controlling the fluid channel of the hydraulically controlled valve; The position sensor is installed on the hydraulic control valve actuator to detect the actual position and state of the rotating shaft in real time and feed back the detection information to the hydraulic valve master control.

[0006] Preferably, the hydraulic control valve communication circuit adopts AES encryption protocol.

[0007] Preferably, the hydraulically controlled valve actuator drive circuit comprises a motor, a motor power supply and a motor drive circuit, and the locking mechanism of the rotating shaft is driven by the motor.

[0008] Preferably, the position sensor is a non-contact magnetic encoder capable of detecting the position and speed of the rotating shaft in real time.

[0009] Preferably, the device also includes a fault alarm function, and when the position sensor detects that the position of the rotating shaft is abnormal or the communication circuit fails, the main control unit triggers a fault alarm.

[0010] In summary, compared with the prior art, the present invention has the following beneficial technical effects: (1) The present invention adopts a non-contact magnetic encoder by setting a position sensor, which can detect the position and speed of the rotating shaft in real time and accurately, and feed back the information to the hydraulic valve master control, thereby realizing accurate control of the position of the rotating shaft and improving control accuracy and reliability; (2) The present invention adopts the hydraulic control valve communication circuit of the AES encryption protocol, which effectively prevents the command signal from being cracked, ensures the security of communication, and meets the requirements for secure communication in industrial production; (3) The present invention provides a hydraulically controlled valve actuator drive circuit, which stably drives the locking mechanism of the rotating shaft through a motor, thereby ensuring that the opening and closing actions of the hydraulically controlled valve are accurate and reliable; (4) The present invention has a fault alarm function that can trigger an alarm in time when the rotating shaft position is abnormal or the communication circuit fails, which is convenient for operators to quickly find and solve problems and reduce equipment downtime and potential risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is a circuit diagram of a hydraulic valve power supply circuit in the present invention; Figure 3 It is a circuit diagram of the hydraulic valve master control in the present invention; Figure 4 is a circuit diagram of a motor power supply circuit in the present invention; Figure 5 It is a circuit diagram of the motor drive circuit in the present invention. DETAILED DESCRIPTION

[0012] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of the present invention is not limited to the following embodiments, and any form of modification and / or change made to the present invention will fall within the protection scope of the present invention.

[0013] like Figure 1 As shown, the present invention discloses a technical solution, a rotating shaft position locking device, comprising: The hydraulic control valve power supply circuit is used to provide power to the entire device to ensure the normal operation of each component.

[0014] The hydraulic valve master control, as the control center of the device, is used to control the operating logic of the device, receive external commands, and perform overall regulation of the device based on the commands and information fed back by the position sensor.

[0015] The hydraulic control valve communication circuit adopts an encrypted communication protocol to achieve secure communication with external devices or systems, ensuring the security and unbreakability of command signals during transmission, thereby improving the safety of the device.

[0016] The hydraulic control valve actuator drive circuit includes a motor, a motor power supply and a motor drive circuit. The motor drive circuit controls the operation of the motor, thereby driving the rotating shaft of the hydraulic control valve actuator and its locking mechanism to realize the opening and closing of the hydraulic control valve.

[0017] The hydraulically controlled valve actuator includes a rotating shaft and a locking mechanism thereof. The rotation and locking of the rotating shaft are realized by the hydraulically controlled valve actuator driving circuit, thereby controlling the fluid channel of the hydraulically controlled valve. The rotating shaft and its locking mechanism are prior art, and their specific structure will not be repeated here.

[0018] The position sensor is installed on the hydraulic control valve actuator and adopts a non-contact magnetic encoder. It can detect the actual position and speed of the rotating shaft in real time, and feed back the detection information to the hydraulic valve master control to achieve precise control.

[0019] Specifically, the hydraulic control valve communication circuit adopts the AES encryption protocol to effectively prevent the command signal from being cracked, ensure the security of communication, and meet the requirements for secure communication in industrial production.

[0020] Specifically, the device also includes a fault alarm function, which uses an audible and visual alarm and is connected to the hydraulic valve main control unit. When the position sensor detects an abnormal position of the rotating shaft or a communication circuit failure, the main control unit triggers a fault alarm.

[0021] like Figure 2 The figure shows the hydraulic valve power supply circuit, which includes a power supply circuit part and a communication circuit part.

[0022] Power supply circuit part: The external power supply is connected through interface P3. P3 contains ground (GND) and analog ground (AGND) pins to provide a potential reference for the circuit. The connected power supply is rectified by diodes D13 and D14. D14 is a transient voltage suppression diode, which can effectively prevent overvoltage from damaging the circuit and ensure circuit safety. Subsequently, the voltage is input to the Vin pin of the voltage regulator U7 (model 7805). After conversion, a stable 5V voltage is output from the Vout pin. The voltage divider circuit composed of R48 and R49 is used to monitor or sample the input voltage. The output 5V voltage is filtered by capacitors C6, C7, C5, etc. to further remove ripple interference, and finally provide a stable 5V power supply for other circuit modules through interface CN3.

[0023] Communication circuit part: The circuit contains CAN bus communication related circuits. CANH and CANL signals are connected to CAN transceiver U9 (model TJA1040) through resistors R50 and R51 respectively. R29 and R30 are terminal resistors, which, together with capacitor C23, can improve the stability and anti-interference ability of CAN bus signal transmission. U9 converts CAN bus signals into level signals suitable for chip processing, and exchanges data with other chips through RXD and TXD pins. At the same time, an isolation chip U8 (model ADUM1201ARZ-RL7) is used to electrically isolate the communication circuit, which enhances the reliability and anti-interference ability of communication and effectively prevents external interference from affecting the communication signal.

[0024] like Figure 3 The figure shows the main control circuit of the hydraulic valve, including the main control chip, analog signal processing, communication interface, motor control, status indication and control, sensor connection and clock and start circuit.

[0025] Main control chip: STM32F103C8T6 is used as the main control chip, which has rich peripheral interfaces and powerful data processing capabilities. The pins of the chip are reasonably allocated for different functions.

[0026] Analog signal processing: Pin ADC (PA0) is connected to an external analog signal source to collect analog signals such as pressure and flow, and convert them into digital signals through the analog-to-digital conversion module inside the chip for subsequent processing.

[0027] Communication interface: It has multiple USART interfaces, such as USART1_TX (PA9), USART1_RX (PA10), USART2_TX (PA2), and USART2_RX (PA3), which can realize serial communication with other devices or modules, and are used to receive external control commands or send hydraulic valve status information, etc. The CAN_RX (PB8) and CAN_TX (PB9) pins are used for CAN bus communication, which can realize reliable data transmission in industrial field bus environment.

[0028] Motor control: Pins MOTER (PA4) and MOTER1 (PA5) can be connected to the motor drive circuit to control the motor in the hydraulic valve actuator to achieve operations such as opening, closing, and opening adjustment of the hydraulic valve.

[0029] Status indication and control: The RUN_LED (PB3) pin can be connected to an indicator light to indicate the operating status of the main control circuit; the BEEP (PA8) pin can be connected to a buzzer to sound an alarm when a fault or abnormality occurs. In addition, the SW4 (PB0), SW3 (PB1) and other pins can be connected to external switches for manual control or setting of related parameters.

[0030] Sensor connection: SHT_SCL (PB6) and SHT_SDA (PB7) pins can be connected to temperature and humidity sensors to collect environmental parameters; GD_IN1 (PA6) and GD_IN2 (PC13) pins can be connected to position sensors to obtain the position status information of the hydraulic valve actuator.

[0031] Clock and startup circuit: PC14-OSC32_IN and PC15-OSC32_OUT pins are connected to an external 32.768kHz crystal oscillator to provide a low-power real-time clock for the chip; PD0-OSC_IN and PD1 pins are connected to an external high-speed crystal oscillator (V1) to provide the main clock for the chip. The BOOT0 pin and NRST pin are used to set the startup mode and reset the chip respectively.

[0032] like Figure 4 Shown is the motor power supply circuit, including the voltage regulator and filter capacitors.

[0033] Voltage regulator: HT7533-1 voltage regulators U6 and U3 are used. The input voltage VIN is connected to the Vin pins of U6 and U3 respectively. After being processed by the voltage regulator circuit inside the voltage regulator, a stable voltage is output from the Vout pin, which are VDD and VCC respectively. HT7533-1 is a low voltage drop linear regulator that can output a stable 3.3V voltage (based on the model, the specific output voltage is subject to the actual situation) when the input voltage fluctuates, providing a stable power supply for the motor and related circuits.

[0034] Filter capacitors: Filter capacitors C33 and C31 are connected to the output ends of U6 and U3 respectively, with a capacity of 100nF (104) and a withstand voltage of 50V. These capacitors are used to filter out high-frequency ripples in the output voltage, further improve the stability and purity of the output voltage, and reduce the interference of ripples on the motor and other circuit components.

[0035] like Figure 5 The figure shows the motor drive circuit, including a power management module, a main control chip and an interface part.

[0036] Power management module: The HT71201 chip (U4) is used as the power management element. The IN1 and IN2 pins of the chip are connected to the input power supply (VDD) respectively. After being processed by the internal circuit, a stable voltage is output from the OUT1 and OUT2 pins to provide a reliable power supply for the subsequent circuits. At the same time, resistors R37 and R38 (resistance value is 100KΩ, accuracy ±1%) are connected between VDD and ground respectively to play a role in voltage division or voltage stabilization.

[0037] Main control chip: STC8G1K08 chip (U2) is selected as the main control core. This chip has rich pin functions. The P54 pin is connected to VCC to obtain power. The P31 / TX and P30 / RX pins are used for the sending (TX) and receiving (RX) functions of serial communication respectively. It can realize data interaction with external devices or main control systems, and facilitate remote or precise control of motor drive. The P33 pin is connected to the CLOSE signal, and the P55 pin is connected to the OPEN signal, which may be used to control the forward and reverse rotation of the motor.

[0038] Interface part: Connect to the motor through the Header2 interface (U5) to realize the transmission of power supply, signals, etc., which enhances the scalability of the circuit and compatibility with other systems.

[0039] It should be noted here that the above circuit diagram only provides a feasible solution, but does not limit the protection scope of the circuit in this application, as long as the corresponding functions of the above circuit can be achieved.

[0040] The present application provides a rotating shaft position locking device, the working process of which is as follows: 1. Receiving instructions: The external device sends encrypted control instructions to the hydraulic valve master through the hydraulic control valve communication circuit, such as the rotation axis locking or unlocking instructions; 2. Command processing: The hydraulic control valve communication circuit decrypts the received command and transmits the decrypted command to the hydraulic valve master control. The hydraulic valve master control determines whether to execute the corresponding operation based on the command and the real-time feedback of the rotating shaft position and speed information from the position sensor; 3. Execute operation: If an operation needs to be executed, such as locking the rotating shaft, the hydraulic valve master control sends a control signal to the hydraulic control valve actuator drive circuit, and the motor drive circuit controls the stepper motor to rotate, driving the locking mechanism of the rotating shaft to achieve the locking of the rotating shaft. During the locking process, the position sensor continuously detects the position and speed of the rotating shaft and feeds back the information to the hydraulic valve master control. The master control fine-tunes the rotation of the motor based on the feedback information to ensure that the rotating shaft is accurately locked at the target position; 4. Fault detection and alarm: During the entire operation process, the position sensor monitors the position and status of the rotating shaft in real time, and the communication circuit also continuously detects the communication status. Once the position sensor detects an abnormal position of the rotating shaft or a fault in the communication circuit, the hydraulic valve master control immediately triggers the fault alarm function to remind the operator to handle it.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rotating shaft position locking device, characterized in that: include: The hydraulic control valve power supply circuit is used to provide power for the entire device; Hydraulic valve master control, used to control the operation logic of the device and receive external instructions; The hydraulic control valve communication circuit uses an encrypted communication protocol to achieve secure communication with external devices or systems; The hydraulic control valve actuator driving circuit is used to drive the hydraulic control valve actuator to realize the opening and closing of the hydraulic control valve; The hydraulically controlled valve actuator includes a rotating shaft and a locking mechanism thereof, and the rotation and locking of the rotating shaft are realized by a driving circuit of the hydraulically controlled valve actuator, thereby controlling the fluid channel of the hydraulically controlled valve; The position sensor is installed on the hydraulic control valve actuator to detect the actual position and state of the rotating shaft in real time and feed back the detection information to the hydraulic valve master control.

2. A rotating shaft position locking device according to claim 1, characterized in that: The hydraulic control valve communication circuit adopts the AES encryption protocol.

3. A rotating shaft position locking device according to claim 1, characterized in that: The hydraulic control valve actuator driving circuit comprises a motor, a motor power supply and a motor driving circuit, and the locking mechanism of the rotating shaft is driven by the motor.

4. A rotating shaft position locking device according to claim 1, characterized in that: The position sensor is a non-contact magnetic encoder, which can detect the position and speed of the rotating shaft in real time.

5. A rotating shaft position locking device according to claim 1, characterized in that: The device also includes a fault alarm function. When the position sensor detects an abnormal position of the rotating shaft or a communication circuit failure, the main control unit triggers a fault alarm.

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